16x21_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack soil mycorrhizae and water saving polymers

mycorrhizae and water saving polymers

Within 4-6 weeks

The dual ball bearings also allow this fan system to be mounted horizontally or vertically

usable depth is 26

commercial base nutrient formulated for the grow/vegetative phase

16x21_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack soil mycorrhizae and water saving polymersNordic Pure Custom MERV 13 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition